hi dave well i have used a reading of 40 and it came up fine as the glass is conditioned to use treated water anything above that is a bit dicey mate u ok spoke to mike woodsetton last week said you sorted his van out for him nice chap
I've cleaned with upto 0.10 and all was fine
Hi DaveI've had a slight problem in the past with water at 15-17ppm tds.I would happily use water at up to 10ppm
glass is conditioned to use treated water